Friday after Ascension Thursday -- Saturday, the Vigil of Pentecost
Begin the Novena to the Holy Spirit today: https://www.ewtn.com/catholicism/devotions/novena-to-the-holy-spirit-13406
'This is the prototype of all novenas. It commemorates the nine days between the Ascension of Our Lord and the descent of the Holy Spirit on the first Pentecost Sunday. During this time Our Lady and the twelve Apostles prayed in the upper room for the coming of the Paraclete.' (EWTN)
O Holy Spirit, O my God, I adore Thee, and acknowledge, here in Thy divine presence, that I am nothing and can do nothing without Thee. Come, great Paraclete, Thou father of the poor, Thou comforter the best, fulfill the promise of our blessed Savior, Who would not leave us orphans, and come into the mind and the heart of Thy poor, unworthy creature, as Thou didst descend on the sacred day of Pentecost on the holy Mother of Jesus and on His first disciples. Grant that I may participate in those gifts which Thou didst communicate to them so wonderfully, and with so much mercy and generosity. Take from my heart whatever is not pleasing to Thee, and make of it a worthy dwelling-place for Thyself. Illumine my mind, that I may see and understand the things that are for my eternal good. Inflame my heart with pure love of Thee, that I may be cleansed from the dross of all inordinate attachments, and that my whole life may be hidden with Jesus in God. Strengthen my will, that I may be made conformable to Thy divine will, and be guided by Thy holy inspirations. Aid me by Thy grace to practice the divine lessons of humility, poverty, obedience, and contempt of the world, which Jesus taught us in His mortal life.
Oh, rend the heavens, and come down, consoling Spirit! that inspired and encouraged by Thee, I may faithfully comply with the duties of my state, carry my daily cross most patiently, and endeavor to accomplish the divine will with the utmost perfection. Spirit of love! Spirit of purity! Spirit of peace! Sanctify my soul more and more, and give me that heavenly peace which the world cannot give. Bless our Holy Father the Pope, bless the Church, bless our bishops, our priests, all Religious Orders, and all the faithful, that they may be filled with the spirit of Christ and labor earnestly for the spread of His kingdom.
O Holy Spirit, Thou Giver of every good and perfect gift, grant me, I beseech Thee, the intentions of this novena. May Thy will be done in me and through me. Mayest Thou be praised and glorified forevermore!